Alcatel-Lucent 9500 MXC, User Manual, Page: 537 / 916

9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. IV-10-13
DHCP Server Function
The IP addressing screens include an option to enable a DHCP server (Dynamic
Host Communications Protocol) on a 9500 MXC Node/Terminal.
The DHCP server function is used to support Ethernet NMS access for your CT
PC whereby 9500 MXC-to-PC connection is established under DHCP; the
DHCP server on 9500 MXC assigns an IP address for your CT PC, which is
configured to obtain and IP address automatically.
For information on the DHCP option and CT PC laptop setup, refer to 9500
MXC CT to 9500 MXC Connection Options on page 2-3 of Volume IV.
Refer to:
• Rules, Hints and Tips for a DHCP Server on page 10-13
• Configuring The DHCP Server on page 10-15
Rules, Hints and Tips for a DHCP Server
This information should be read in conjunction with data provided under 9500
MXC CT to 9500 MXC Connection Options on page 2-3 of Volume IV.
• DHCP is not default enabled.
• The primary benefit of the DHCP server is that it enables Ethernet access
without needing to know the IP address of the target radio. Under DHCP, your
PC is configured in the TCP/IP properties window to obtain an IP address
automatically, and the radio provides a LAN compatible address to your CT PC.
• The IP address assigned by the server has a ‘lease time’ of 30 seconds,
meaning the IP address remains assigned for this minimum period. On
expiry of the lease, such as at CT disconnection, the address goes back in the
address pool, ready for re-assignment.
• If you disconnect your CT PC and then reconnect while the lease is valid,
your PC will reconnect using the same IP address - the address assigned
under the lease. Conversely, if you reconnect after 30 seconds, your PC will
be re-assigned an IP address, which may or may not be the same as before.
From a CT user’s perspective this operation is transparent.
• If you change the IP address of the radio you are DHCP connected to, when you
click Send to confirm the change, the CT session will be interrupted for between
30 to 50 seconds, during which time the lease time for the original lease expires
and a new DHCP lease is assigned (This interruption time is a
Windows-imposed limitation; Windows 98, 2000 and XP).